Single-Ion Atomic Clock with 3×10(-18) Systematic Uncertainty.

  title={Single-Ion Atomic Clock with 3×10(-18) Systematic Uncertainty.},
  author={N. Huntemann and Christian Sanner and Burghard Lipphardt and Chr. Tamm and Ekkehard Peik},
  journal={Physical review letters},
  volume={116 6},
We experimentally investigate an optical frequency standard based on the (2)S1/2(F=0)→(2)F7/2(F=3) electric octupole (E3) transition of a single trapped (171)Yb+ ion. For the spectroscopy of this strongly forbidden transition, we utilize a Ramsey-type excitation scheme that provides immunity to probe-induced frequency shifts. The cancellation of these shifts is controlled by interleaved single-pulse Rabi spectroscopy, which reduces the related relative frequency uncertainty to 1.1×10(-18). To… 

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